Richard H. Sadowski, DMD, PC
90 Route 6A, Suite 2, Sandwich, MA 02563
Phone: (508) 888-4001

Welcome to the Practice of John L. Peterman, DMD

Thank you for choosing the dental practice of Dr. John L. Peterman, DMD, formerly the office of Dr. Richard H. Sadowski. Dr. Sadowski proudly served the Sandwich community and its surrounding areas for over 30 years and Dr. Peterman is excited to continue providing the same level of care to new and existing patients. It is our mission as your dentist in Sandwich to provide you and your family with exceptional quality dental care for many years to come.

We pride ourselves on providing the highest level of personalized dental care and Dr. Peterman takes the time to carefully discuss every treatment option with our patients. We feel that by helping our patients make informed decisions about their oral care, we can provide the best level of service and achieve the most successful results. With a strong commitment to excellence, our practice utilizes the latest technology available, taking advantage of the many new and exciting advances in dental science.

Dr. Peterman provides comprehensive dental care for both adults and children including:

  • Emergency Treatment
  • Preventive & Restorative Care
  • Cosmetic Smile Makeovers
  • Teeth Whitening
  • Pediatric Dentistry
  • Porcelain Veneers
  • Implants
  • Dental Crowns & Bridges
  • Dentures
  • Periodontal Treatment

Throughout this website you will find an abundance of information about our practice, the procedures we provide and how we can help you maintain excellent oral health. Please feel free to contact us if you need any additional information or to schedule an appointment.

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We are located at 90 Route 6A, Suite 2, Sandwich, MA 02563.

Office Hours

8:30am - 5:30pm
8:30am - 5:30pm
8:30am - 5:30pm
8:30am - 5:30pm


"Dr. Sadowski has been our family dentist for years, he is extremely professional, skilled and genuinely invested in you, his staff is amazing and have been with him forever, which speaks volumes. They aren't just our family dentist, they are extended family."

"I called with what I thought was an emergency and I was seen within five minutes. My condition was diagnosed within ten to fifteen minutes and appropriate medication and an appointment for further treatment was determined. As always a pleasant experience"

"I always feel like I am visiting with friends when I go to Dr. Sadowski's office. Along with a friendly atmosphere, the staff is very professional. I know I am getting the very best care. My comfort and concerns are always taken very seriously. Dr. Sadowski and his staff are the best!!"

"I can not find anything wrong. It is actually a very pleasant experience to go to Dr. Sadowski's office and his staff is efficient, professional and also very pleasant. I am very happy to be a patient."

Anne Marie